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US 7,479,261 B2Granted
Method of separating and purifying Cesium-131 from Barium nitrate
AssigneeIsoRay Medical, Inc.
InventorsLane Allan Bray, Garrett N Brown
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Abstract
The present invention provides a method of separating and purifying Cesium-131 (Cs-131) from Barium (Ba). Uses of the Cs-131 purified by the method include cancer research and treatment, such as for the use in brachytherapy. Cs-131 is particularly useful in the treatment of faster growing tumors.
Claims14
A method for purifying Cs-131, comprising the steps of:
- (a) dissolving neutron-irradiated barium comprising barium and Cs-131, in a solution comprising an acid;
- (b) concentrating the solution to leave solution and solids;
- (c) contacting the solution and solids with a solution of at least 68-wt % nitric acid, whereby Cs-131 is dissolved in the acid solution and barium is precipitated as a solid;
- and
- (d) separating the solids of step (c) from the acid solution containing the Cs-131, thereby purifying the Cs-131.
2 more elements
Dependencies are inferred from the claim text.